CN101827709B - Droplet break-up device - Google Patents

Droplet break-up device Download PDF

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Publication number
CN101827709B
CN101827709B CN200880112437.7A CN200880112437A CN101827709B CN 101827709 B CN101827709 B CN 101827709B CN 200880112437 A CN200880112437 A CN 200880112437A CN 101827709 B CN101827709 B CN 101827709B
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CN
China
Prior art keywords
exit passageway
revolving member
chamber
droplet break
place
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN200880112437.7A
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Chinese (zh)
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CN101827709A (en
Inventor
R·J·胡本
L·A·M·布劳沃斯
A·瑞吉菲尔斯
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Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
Original Assignee
Nederlandse Organisatie voor Toegepast Natuurwetenschappelijk Onderzoek TNO
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Publication of CN101827709A publication Critical patent/CN101827709A/en
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Publication of CN101827709B publication Critical patent/CN101827709B/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B41PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41JTYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
    • B41J2/00Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
    • B41J2/005Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
    • B41J2/01Ink jet
    • B41J2/015Ink jet characterised by the jet generation process
    • B41J2/02Ink jet characterised by the jet generation process generating a continuous ink jet
    • B41J2/03Ink jet characterised by the jet generation process generating a continuous ink jet by pressure
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/001Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements incorporating means for heating or cooling, e.g. the material to be sprayed
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05BSPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B3/00Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
    • B05B3/02Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
    • B05B3/10Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces
    • B05B3/1007Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements discharging over substantially the whole periphery of the rotating member, i.e. the spraying being effected by centrifugal forces characterised by the rotating member

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  • Coating Apparatus (AREA)
  • Ink Jet (AREA)
  • Particle Formation And Scattering Control In Inkjet Printers (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

The invention relates to a droplet break up device (1) comprising: a chamber (2) for containing a pressurized printing liquid (3) comprising a bottom plate; at least one outlet channel (4, 4') having a central axis, provided in said chamber for ejecting the printing liquid; and an actuator for breaking up,a fluid jetted out of the outlet channel. The actuator comprises a revolving, member (5) comprising a surface deformation (7, 7') shaped to provide a pressure pulse near the outlet channel. Accordingly, a simple mechanism is provided for providing multiple printing nozzles.

Description

Droplet break-up device
Technical field
The present invention relates to droplet break-up device, also referred to as dripping as required system or continuous print system, be configured to various patterns liquid droplets from printing nozzle in the field.
Background technology
Relevant therewith, the continous inkjet printing technique refers to produce continuously drop, for predetermined print procedure, optionally utilizes these drops.Drop technology is opposite as required with the what is called that produces drop according to predetermined print procedure, drop be continuous supplying to.
For example, at US Patent specification US5, a kind of known device has been described in 969,733.The document has disclosed a kind of so-called continous inkjet printers, is used for printing the material that comprises viscous fluid.For this printer, can print viscous fluid.Withdraw from the process of exit passageway at viscous fluid, pressure regulating mechanism provides the pressure that flows out near the viscous fluid opening to change with pre-defined rule.This causes in the fluid jet that flows out this outflow opening, disturbance occuring.This disturbance causes jet to shrink, and jet shrinks and causes jet splitting to become drop.This just makes the Continuous Flow of ejection drop in the properties such as drop size, even distribution be arranged.The actuator of governor motion is arranged to the oscillatory type plunger pin by piezoelectric element actuated.This infrastructure cost is higher and be difficult to be upgraded to a plurality of nozzles.
Summary of the invention
In one aspect, the present invention aims to provide a kind of mitotic apparatus, and this mitotic apparatus is simple in structure and can be easy to be upgraded to a plurality of nozzles, thereby overcomes the limitation of present system.
According to an aspect of the present invention, provide a kind of droplet break-up device, this droplet break-up device comprises chamber, is used for holding the pressurization printing fluid; At least one exit passageway, described exit passageway are arranged in chamber to be used for jet printing liquid; And actuator, be used for making the fluid division of ejection exit passageway; Wherein, actuator comprises revolving member, and this revolving member has is arranged to the bottom surface relative with exit passageway, and actuator comprises areal deformation place, and described areal deformation place is configured as pressure pulse is provided near exit passageway.
According to a further aspect in the invention, provide a kind of for the method for jet printing with drop, the method comprises: chamber is provided, and described chamber is used for holding printing fluid and comprising exit passageway; Liquid is pressurizeed, and pressure pulse is applied near exit passageway liquid, thereby make the fluid division of ejection exit passageway; Wherein, pressure pulse is to apply by the jet disturbing type that rotation causes.
By revolving member, can produce a kind of simple and effective jet disturbing type, thereby be easy to upgrade to Multe-jet system.
In addition, by high pressure, can spray the fluid with very high viscosity, for example the viscosity of viscous fluid when processed is 300.10 -3Pa.s.Specifically, predetermined pressure can be up to 600 bar.
Description of drawings
Other feature and advantage will become apparent in description taken together with the accompanying drawings, in the accompanying drawings:
Fig. 1 schematically shows the first embodiment for print system of the present invention;
Fig. 2 schematically shows the stereogram according to droplet break-up device of the present invention;
Fig. 3 schematically shows the cutaway view of the droplet break-up device of Fig. 2;
Fig. 4 schematically shows the details in Fig. 3;
Fig. 5 shows the diagrammatic top view of revolving member according to an embodiment of the invention; And
Fig. 6 shows diagrammatic side view according to another embodiment of the present invention.
The specific embodiment
Fig. 1 shows according to droplet break-up device the first exemplary embodiment of the present invention.
The droplet break-up device 1 that schematically illustrates in Fig. 1 is also referred to as printhead, and this droplet break-up device 1 comprises be used to the chamber 2 that holds the printing fluid 3 that pressurizes.Chamber can be provided with for the pump that printing fluid is pressurizeed, and perhaps is provided with for the access road (not shown) of admitting fluid under pressure.In this embodiment, two exit passageways 4,4 ' are arranged in chamber 2.Printing fluid is through exit passageway 4,4 ' the form ejection with drop 9.Pressure pulse makes from the fluid jet of exit passageway 4 ejections and divides to produce drop 9.Pressure pulse is provided by the revolving member 5 that forms disk.Revolving member 5 comprises is arranged to the bottom surface 6 relative with exit passageway 4.By be included in areal deformation place 7 in bottom surface 6,7 ' motion produces pressure pulse.Therefore, pressure pulse results near exit passageway 4, thereby forms drop 9 by fluid 3.In detail, has variable-sized less dischargeable capacity by making areal deformation place 7 motions in the bottom surface 6 that is formed on revolving member 5, just can producing near exit passageway.Produce pressure pulse by this variable volume, this pressure pulse is transferred in exit passageway and is made the fluid jet division of ejection from exit passageway 4.The general size of distortion place is about the size of exit passageway 4, and for example the height of distortion place is the 20-1000 micron, is more preferably the 20-300 micron.In Fig. 1, revolving member 5 schematically is shown as has central bearing part 17, and revolving member 5 rotates around this central authorities' bearing part 17.Also show drive unit in the figure of back, such as driving shaft and drive motor.
Exit passageway 4 is included in relatively thin nozzle plate 8, and this nozzle plate 8 can be the plate of being made by tinsel in this example, and thickness is 0.3mm.In this example, the diameter of the exit passageway 4 in plate 8 is 50 μ m.The lateral dimension of exit passageway 4 can be the 2-500 micron, is more preferably the 5-250 micron, better be the 5-100 micron.As the indication of the size of pressure adjustable range, for example average pressure is about 0.5-600 bar (≡ 0.5-600 * 10 5Pa).Printhead 1 also can be provided with the support plate (not shown), and this support plate is supporting nozzle plate 8, thereby can not subside under the high pressure of nozzle plate 8 in chamber.
Fig. 2 schematically illustrates the stereogram of printhead 1 according to an embodiment of the invention.Device 1 comprises drive motor 10, and this drive motor 10 is arranged to be adjacent to the chamber 2 of droplet break-up device via bearing part 20.Chamber 2 comprises the printing-fluid entrance 11 that is arranged for admittance pressurization printing-fluid.In this exemplary embodiment, drive motor 10 is the electric rotating machines with axle 12, and this axle 12 extends to chamber 2 and is connected to as shown in Figure 1 revolving member 5.Perhaps, drive motor can be arranged to the part of revolving member 5, and/or for example when not wanting to seal, and connects via magnetic to be connected with revolving member 5.During the high temperature printing fluid of motlten metal under for example processing 700-1200 ℃ of temperature and so on, thereby the extension of axle can provide thermodynamic barrier to prevent that drive motor 10 is overheated.
Fig. 3 illustrates in greater detail the cutaway view of droplet break-up device shown in Figure 21.Specifically, drive motor 10 is shown as has turning cylinder 12, and this turning cylinder 12 extends through chamber 2 via sealed bearing 13,13 '.Fluid intake 11 is shown as with chamber 2 and contacts, and revolving member 5 is shown as and is attached to turning cylinder 12.Chamber 2 and bearing part 20 relative to each other seal by seal.Be arranged to be fixed to the wall 80 of chamber 2 by the nozzle plate 8 of support plate 800 supportings.Fluid issuing 4,4 ' is shown as on revolving member 5 relative.Be resisted against on central ball bearing part 17 by the depression bottom surface 6 of revolving member 5 is shelved, produce little space 15 (seeing Fig. 4).Except spherical bearings, also can imagine the fluid bearings part.Depression bottom surface 6 is communicated with the remainder fluid of chamber 2 via through hole 14.Through hole is used for making near the pressure balance exit passageway 4,4 ', and can reduce the axial force on revolving member 5.
Fig. 4 illustrates the signal details I of Fig. 3.The bottom surface 6 that sunk area 15 schematically is shown as by revolving member 5 forms.In addition, also show revolving member 5 and how interruptedly to provide sealing for exit passageway 4.Show in this embodiment, revolving member 5 is slidably coupled to diapire 8.Perhaps, the distance that revolving member can the 0-500 micron is left base plate 8 slightly.Larger distance is conducive to and being communicated with of chamber 2, but can weaken impulse magnitude.As an exemplary explanation, the size of exit passageway 4 can be the 2-500 micron, preferably is about the 5-250 micron, is more preferably the 5-100 micron, this depends on that printing fluid material 3 and institute want drop size, this institute to want drop size may be far smaller than 50 microns.In addition, nozzle plate 8 can have the thickness of 0.1-3 millimeter, and it defines the exit passageway length of exit passageway 4.
Fig. 5 shows the top view of revolving member 5 according to an embodiment of the invention.As shown in the figure, notch 70 is arranged in distortion place in the bottom surface, substitutes depression shown in Figure 17.The form that also has other can be in revolving member 5 such as wavy section, teat, depression or through hole, this revolving member 5 is disk or annulus normally.In one aspect of the invention, a kind of liquid droplets 9 as shown in figure institute 1 comprises with the method that is used for printing: provide to hold the chamber 2 of pressure fluid 3, this chamber comprises base plate 8 and exit passageway 4.Except printing fluid is pressurizeed, also pressure pulse can be applied near the liquid of exit passageway 4, thereby make the fluid division from the exit passageway ejection.According to an aspect of the present invention, pressure pulse is to apply by the jet disturbing type that rotation causes.By rotating, the jet pulse frequency can be far above 20kHz, and this can be multiplied by a plurality of distortion place are set on revolving member 5.
Fig. 6 shows the signal three-dimensional side view of another embodiment of the present invention, and wherein, revolving member forms the taper revolving member 5 with depression or groove 7.This embodiment has following advantage: it is along assembling direction guiding exit passageway 4, and this can be useful in the spray-drying industrial applications that for example produces a large amount of sprayings.The quantity of exit passageway 4 can be a plurality of along the circumference of cone 5, and its diameter can be 5-500mm.For example, the quantity of passage can be 10-500, and along the height of cone 5,20-100 outlet is for example arranged, and carries out producing in a large number becoming feasible thereby make in mode simple, with low cost.The height of cone can be several centimetres, for example 2-10cm.
Should be noted that, along groove 7 quantity of circumference, division frequency is directly doubled, thereby, for example can obtain to surpass the drop frequency of 53kHz with 400 grooves under the rotating speed of 8000rpm.Rotating speed can be between 500-20000rpm, and the quantity of groove can be between 5-100, thereby arrives the division frequency far above 20kHz.
Described the present invention based on an exemplary embodiment, but in any case the present invention also is not limited to this embodiment.Specifically, scope of the present invention comprises that all drops produce form, for example is used for spray-drying, rapid prototyping making or other printing purposes.Within multiple modification all falls into scope of the present invention.For example, what can expect is, provides adjustable heating element heater to be arranged in the viscosity printing fluid of passage with heating at the temperature of 15-1300 ℃ for example.By regulating the temperature of fluid, fluid just can obtain the particular viscosity for the treatment of (printing).This just can print the viscous fluid such as dissimilar plastics and metal (such as tin).

Claims (17)

1. droplet break-up device that is used for liquid jet is split into drop comprises:
Chamber is used for holding the pressurization printing fluid;
At least one exit passageway, described exit passageway are arranged in described chamber to be used for spraying described printing fluid; And
Actuator is used for making the fluid division of the described exit passageway of ejection; Wherein
Described actuator comprises is arranged to the revolving member relative with described exit passageway in described chamber, described revolving member comprises areal deformation place, described areal deformation place is configured as by mobile described distortion has variable-sized dischargeable capacity for providing pressure pulse to provide near the printing fluid described exit passageway
Wherein, described chamber comprises the wall that is fixed to described chamber and the nozzle plate that is supported by support plate, described exit passageway is arranged in described nozzle plate, and wherein, described exit passageway and described areal deformation are sized to by the pressure pulse that will be transferred to described exit passageway and make liquid jet split into the drop of discharging from described exit passageway.
2. droplet break-up device as claimed in claim 1, is characterized in that, described revolving member is provided with a plurality of areal deformations place; And it is relative with single revolving member that a plurality of exit passageways are arranged to.
3. droplet break-up device as claimed in claim 1, is characterized in that, described revolving member is provided with: perimeter region is arranged on described distortion place in described perimeter region, and is used near the concavity of the pressure the described exit passageway of balance.
4. droplet break-up device as claimed in claim 3, is characterized in that, described concavity is provided with the through hole that is connected to described chamber.
5. droplet break-up device as claimed in claim 3, is characterized in that, described concavity is configured as the central bearing part that comprises described revolving member.
6. droplet break-up device as claimed in claim 1, is characterized in that, described revolving member forms circular disk, and depression, teat, through hole or notch in described circular disk are arranged in described distortion place.
7. droplet break-up device as claimed in claim 1, is characterized in that, described distortion place is along the circumference setting.
8. droplet break-up device as claimed in claim 1, is characterized in that, described revolving member is activated by the turning cylinder that extends through described chamber; Described revolving member is attached to drive motor, and described drive motor is arranged to be adjacent to described chamber via seal.
9. droplet break-up device as claimed in claim 1, is characterized in that, described revolving member is annular, and be attached to slidably the diapire of described chamber.
10. droplet break-up device as claimed in claim 1, is characterized in that, described revolving member is taper, and described exit passageway extends along assembling direction.
11. droplet break-up device as claimed in claim 1 is characterized in that, the diameter of described exit passageway is the 2-500 micron.
12. droplet break-up device as claimed in claim 11 is characterized in that, the diameter of described exit passageway is the 5-250 micron.
13. droplet break-up device as claimed in claim 12 is characterized in that, the diameter of described exit passageway is the 5-100 micron.
14. droplet break-up device as claimed in claim 1 is characterized in that, the length of described exit passageway is the 0.1-3 millimeter.
15. droplet break-up device as claimed in claim 1 is characterized in that, a plurality of areal deformations place are arranged on described revolving member, and the quantity of described a plurality of areal deformations place is greater than 5, and the rotating speed of described revolving member is greater than 500rpm.
16. droplet break-up device as claimed in claim 15 is characterized in that, the quantity of described a plurality of areal deformations place is greater than 100; The rotating speed of described revolving member is greater than 5000rpm.
17. the method for a liquid droplets comprises:
Chamber is provided, and described chamber is used for holding printing fluid and comprising exit passageway;
Described printing fluid is pressurizeed;
Pressure pulse is applied near described exit passageway fluid under pressure, thereby makes the fluid division of the described exit passageway of ejection;
Wherein, described pressure pulse is to apply by the jet disturbing type that rotation causes,
The jet disturbing type that described rotation causes is provided by actuator, described actuator comprises is arranged to the revolving member relative with described exit passageway in described chamber, described revolving member comprises areal deformation place, described areal deformation place is configured as by mobile described distortion has variable-sized dischargeable capacity for providing pressure pulse to provide near the printing fluid described exit passageway
Wherein, described chamber comprises the wall that is fixed to described chamber and the nozzle plate that is supported by support plate, described exit passageway is arranged in described nozzle plate, and wherein, described exit passageway and described areal deformation are sized to by the pressure pulse that will be transferred to described exit passageway and make liquid jet split into the drop of discharging from described exit passageway.
CN200880112437.7A 2007-08-31 2008-09-01 Droplet break-up device Expired - Fee Related CN101827709B (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP07115425.6 2007-08-31
EP07115425A EP2030790A1 (en) 2007-08-31 2007-08-31 Droplet break-up device
PCT/NL2008/050578 WO2009028947A1 (en) 2007-08-31 2008-09-01 Droplet break-up device

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CN101827709A CN101827709A (en) 2010-09-08
CN101827709B true CN101827709B (en) 2013-06-26

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US (1) US9056453B2 (en)
EP (2) EP2030790A1 (en)
JP (1) JP5523320B2 (en)
CN (1) CN101827709B (en)
CA (1) CA2698010A1 (en)
DK (1) DK2203311T3 (en)
ES (1) ES2391232T3 (en)
WO (1) WO2009028947A1 (en)

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JP5832975B2 (en) 2012-09-07 2015-12-16 株式会社東芝 Ink jet recording apparatus and recording method
CN107415469B (en) * 2014-02-26 2018-12-14 株式会社东芝 Ink-jet recording apparatus
GB2525634B (en) 2014-04-30 2019-02-06 Univ Southampton A method for generating droplets
CN105478177A (en) * 2014-09-18 2016-04-13 苏州贝和医疗科技有限公司 Droplet generation device and method used for digital PCR
CN105584218A (en) * 2016-02-01 2016-05-18 厦门英杰华机电科技有限公司 CIJ code spraying system with double parallel nozzles
JP2019171580A (en) * 2018-03-27 2019-10-10 三菱重工業株式会社 Ink jet discharge method, method for manufacturing member, and ink jet discharge apparatus

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Publication number Publication date
EP2203311A1 (en) 2010-07-07
US20100201758A1 (en) 2010-08-12
EP2030790A1 (en) 2009-03-04
DK2203311T3 (en) 2012-10-22
JP5523320B2 (en) 2014-06-18
ES2391232T3 (en) 2012-11-22
WO2009028947A1 (en) 2009-03-05
US9056453B2 (en) 2015-06-16
CN101827709A (en) 2010-09-08
EP2203311B1 (en) 2012-07-25
JP2010537802A (en) 2010-12-09
CA2698010A1 (en) 2009-03-05

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